Pump.



B. T. ROBINSON.

PUMP.

APPLICATION FILED FEB. 12, 1912.

Patented Dec. 22, 1914.

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NORRIS PETERS 60., PHOTO-LITHO., WASHINGTONv D4 0.

E. T. ROBINSON. PUMP.

APPLICATION FILED FEB.1Z, 1912.

l 1 22, 1 60m Patented Dec. 22, 1914.

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E. T. ROBINSON.

PUMP.

APPLICATION FILED PEB.12, 1912. 1 1 2%, 1 60, Patented Dec. 22, 1914.-

5 SHEETS-SHEET 3.

HE NORRIS PETERS 00., F'HOTo-LITHQ, WASHINGruN. D. C

E. T. ROBINSON.

PUMP.

APPLICATION FILED FEB. 12, 1912.

Patented Dec. 22, 19 14.

5 SHEBTS SHEET 4.

W y T Q a Q THE NORRIS PETERS 60.. PHo'ro-LITHQ. WASHING ram, 0 c.

Patented Dec. 22, 1914.

5 SHEETS-SHEET 6.

E. T. ROBINSON.

PUMP.

APPLICATION FILED 1EB.12,1912. 1,122,16.

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PUMP.

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Specification of Letters Patent.

Patented Dec. 22, 191 1.

Application filed February 12, 1912. Serial No. 677,005.

To all whom itmag concern Be it known that I, EARLE T. ROBINSON, a citizen of the United States of America, residing in University City, in the county of St. Louis and State of Missouri, have invented certain new and useful Improvements in Pumps, of which the following is a specification.

This invention relates to pumps, and has for its general object to provide an improved construction, combination and arrangement of parts in multiplex pumping machines for fire engines.

One of the main objects of the present invention is to provide an improved arrangement of the inlet, suction and discharge chambers of a fire engine pump, and of the valves controlling the passageways between said chambers.

A further object is to provide an improved arrangement of the pumping cylinders with respect to said chambers and valves.

More specifically, another object is to provide improved means for reinforcing and stiffening those portions of the apparatus which are peculiarly subject to pressure and shock when the pump is being operated.

Other and further objects will appear in the specification, and be specifically pointed out in the appended claims, reference being had to the accompanying drawings exemplifying the invention, and in which,

Figure 1 is a side elevation of a pumping engine constructed in accordance with the principles of this invention. Fig. 2 is a section on line II-II, Fig. 1. 'Fig. 3 is a section on the line III-I1'I, Fig. 1, showing the upper valve deck. Fig. 4 is a fragmentary section on the line IVIV, Fig. 2. Fig. 5 is a section on line V-V, Fig. 1, showing the lower valve deck. Fig. 6 is a section on the line VI-VI, Fig. 1. Fig. 7 is a section on the line VIIV1I, Fig. 3.

Referring more particularly to the drawings, the embodiment shown therein exemplifies the invention in its application to a triplex fire engine pump.

As shown in Figs. 2 and 5, a lower shell or housing 1 is provided on each side with a bracket arm 2, which terminates in an an gular bracket comprising the vertical plate 3 abutting laterally against a packing block 4 which is seated within the channel of the channel beam 5, being held in position by a bolt 6, and the horizontal platev 7 which rests on the top flange of the channel beam 5. Said channel beam 5, in the present embodiment, forms one of the side rails of the chassis of an automobile fire engine. The bottom shell or casting 1 is provided with a suction valve deck 8, which depends into the housing 1, being connected integrally with the upward portion of the housing 1 by the lateral Walls 9 of a plurality of suction chambers 10. Said suction chambers 10 are adapted to receive a supply of water through a plurality of suction valves 11 from an inlet chamber 12. Means for reinforcing the valve deck 8 from the bottom wall of the housing 1 is provided by a plurality of uprights 13, which are integrally formed with the metal of said housing 1 and said valve deck 8. As shown in Fig. 6, at least one' of the uprights 13 is provided with a central channel 14 leading to the pet-cock 15 to provide means for draining each suction chamber 10 when the pump is not in use.

As shown in Fig. 5, there are eight suction valves for each suction chamber 10, the principal portion of the base member 1 being divided. in the present embodiment, into three parts by partition walls 16.

As shown in Figs. 2, 3 and 4, the cylinders 17 extend upwardly from an upper valve deck 18. and have reciprocally mounted therein the pistons 19, each of said cylinders 17 being disposed immediately above the central four suction valves 11 of each group within each suction chamber 10, so that with each upward movement of a piston 19, there is a flow of water directly into each cylinder 17. The valve deck 18 serves to mount a. pluralitv of lift valves 20 disposed around each cylinder 17. Each group of lift valves 20 is centrally disposed with respect to a pair of suction valves 11 at each end of each group of the suction valves 11.

An important feature of my invention will now be described and consists generally in rigidly supporting the cylinders 17 approximately midway between their ends and in supporting the upper valve deck 18 f om the depending ends of said cvlinders. With this purpose in View, a pedestal or support for these cylinders is provided by the walls of the discharge chamber 21 which in the present embodiment comprises the upright portions 22. which are ta ered upwardlv. the enlarged bases of which are seated rigidly upon the base casting 1 and the inclined top walls 23 which form a rigid integral strut between the middle of the cylinders 17 and the upper edges of the upright walls 22. Said top walls 23 are provided with discharge openings 24. From the top wall extend discharge pipes 25 which connect with said discharge openings. It will appear from an inspection of Fig. 2 that the integral casting comprising the cylinders 17, upper valve deck 18, and the walls of the discharge chamber 21, is perfectly flat on its under face, and after said face has been trued, said casting can be secured to the table of a boring mill and the cylinders 17 very readily finished interiorly. Within each cylinder 17 is inserted a shell 17 of any suitable bearin metal.

As shown in Figs. 1, 2 and 4:, each of the pistons 19 is connected by a pitman 26 to a crank pin 27 carried by one of the toothed disks 28, or, in the center, to the crank arm 29 (see Fig.1). The crank disks 28 and crank arm 29 serve to rotate a crank shaft 30 which is journaled in the upper ends of a pair of spaced standards 31 which are constructed substantially A shaped (see Fig. 2), Each leg of each A frame 31 is secured by suitable bolts 32 to the top wall of the inlet chamber 12; and as shown in Fig. 1, each foot 33 of the A frames is extended lengthwise of the crank shaft 30 to impart rigidity to the pump structure. Connecting each foot 33 with each leg of the uprights 31, are a plurality of webs 34. As shown in Figs. 1, 2 and A, the cylinders 1'7 are integrally connected by a vertical web 35 which provides an effectual reinforcement in the plane of the axis of said cylinders.

It will be noted from an inspection of Fig. 2, that the cylinders 17 are effectively supported and reinforced by the outer and upper walls of the outlet chamber 21, the tapered lateral walls 22 of which abut directly against the lower ends of the standards 31. In order to further interlock the standards 31 with the cylinders 17, however, the web 35 is notched, as shown in dotted lines in Fig. 1, and in full lines, Fig. 4, and the cross rail or bar of the A frames 31 is seated therein. The A frames, cylinders, and valve housing are all thus strongly stiffened, one from the other, both along the aXis of the crank shaft and transversely thereto. To further enhance this stiffening and interlocking connection, the upper ends of the standards 31 are connected by a yoke 36.

Power is delivered to the toothed disks 28 by toothed pinions 38 keyed to shaft 37, to which power may be delivered in any suitable manner not concerned in the present invention.

From either end of the inlet chamber 12, projects an inlet pipe 39 normally closed by a cap 40. When in service, said inlet 39 is connected up with any suitable source of supply. As shown in Figs. 2 and 4, the

web portions of the A standards 31 can be rigidly secured together by a tie bar 11, to the ends of which are secured nuts as; said web portions being spaced apart by means of the sleeve 43, through which the bolt i1 extends. As shown in Figs. 3, 6 and 7, the lower end of each cylinder 17 is rigidly supported from the upper valve deck 18 by means of a plurality of webs The operation of the pumping engine will now be readily understood, and briefly stated is as follows: During the up stroke of the piston 19 for each suction chamber 10, the four suction valves 11 disposed immediately below the lower end of the cylinder open to supply most of the water to the cylinder. At the same time, the reduced pressure in the chamber 10 caused by the upward movement of the piston 19 causes the outer end suction valves to open below the discharge valves, the water lowing therefrom being delivered direct against the discharge valves 20. The energy in such water aids very materially in lifting it through the discharge valves 20 inasmuch as a pump constructed in accordance with the principles of this invention can be run at a very high rate of speed, so that the piston 19 has begun its downward movement by the time the full flow of water has taken place through the outermost valves. The result of this is that a great deal of energy is saved in that a considerable portion of the water does not lose its movement; but, on the other hand, has its energy reinforced and new life given to it by the descent of the piston in the cylinder. This action of the pump is greatly aided by having a large number of quick acting valves, and in having the capacity of the suction valves relatively great to the required capacity of the discharge valves.

The structural features have been fully described in the foregoing specification, and need not be further referred to.

As structural details contributing to an eflicient operation of a pumping engine of this description, the combined cross sectional area of the four centrally disposed suction valves is made greater than the cross sectional area of each of the cylinders 17. On the other hand, the combined area of each pair of the suction valves of each section of the suction chamber is less than the combined cross sectional area of the discharge valves disposed immediately thereabove. By proper designing, therefore, the lift of the several valves of the central group of four suction valves, is adapted to supply suflicient water to fill the cylinder 17 during the upward stroke of the piston 19. On the other hand, the increased area of the discharge valve passageway over the pair of suction valves immediately under them provides for the ready discharge of the water through the end pair of discharge valves under its own momentum, while at the same time being capable of taking care of the water displaced from the cylinder 17 during the down stroke of the piston 19.

IV hat I claim is:

1. In a pump, the combination with a battery of cylinders arranged on parallel axes, all of said cylinders being open at each end, pistons reciprocable within said cylinders, a crank shaft operatively connected with said pistons, standards within which said crank shaft is journaled, a discharge valve deck extending around the lower end of said cylinders, and a suction valve deck disposed below the first said valve deck and forming therewith a suction chamber, said standards being provided with interlocking connections with and between said cylinders.

2. In a pump, the combination with a battery of cylinders arranged on parallel axes, all of said cylinders being open at each end, a discharge valve deck extending around the lower end of said cylinders, a suction valve deck disposed below the first said valve .deck and forming therewith a suction chamber, supporting members located beneath said suction valve deck, and passageways for draining said suction chamber when the pump is at rest formed in said supports.

3. In a pump, the combination with an inlet chamber provided with a top wall forming a suction valve deck, of posts rigidly supporting said valve deck from the lower wall of said inlet chamber, one of said posts being provided with a channel there through for draining the space above said val ve deck.

4. In a pump, the combination with an inlet chamber provided with a top wall forming a suction valve deck, of posts rigidly snpporting said valve deck from the lower wall. of said inlet chamber, one of said posts being provided with a channel therethrough for draining the space above said valve deck; a suction chamber above said inlet chamber; said suction chamber be ing provided with a top wall forming'a discharge valve deck, and a pumping cylinder open at its lower end through said discharge valve deck.

5. In a pump, the combination with a battery of cylinders connected by webs, pistons reciprocable within said cylinders, a crank shaft connected up with said pistons, and means for journaling said crank shaft, said means being provided with interlocking connections with said webs.

6. In a pump, the combination with a battery of cylinders having axes in a common plane, of a web connecting said cylinders in said common plane, pistons reciprocable within said cylinders, a crank shaft operatively connected to said pistons, and standards within which said crank shaft is journaled, said standards being provided with interlocking connections with said webs.

In a power pump, the combination with a pair of spaced A frames, of a crank shaft journaled in the upper ends of said 'frames, a cylinder disposed intermediate of said frames and on either side thereof, pistons reciprocable within said cylinders and operatively connected with said crank shaft, and connecting webs for supporting said cylinders from each other, said webs being provided with notches within which the cross bars of said A frames are seated.

S. In a power pump, the combination with a pair of spaced A frames, of a crank shaft journaled in the upper ends of said frames, a cylinder disposed intermediate of said frames and on either side thereof, pistons reciprocable within said cylinders and operatively connected with said crank shaft, connecting webs for supporting said cylinders from each other, said webs being provided with notches within which the cross bars of said A frames are seated, and means for securing said A frames together at po nts distant from the axial plane of said cylinders.

9. In a pump, the combination with an inlet chamber provided with a top wall forming a suction valve deck, of posts rigidly supporting said valve'deck from the lower wall of said inlet chamber, one of said posts being provided with a channel therethrough for draining the space above said valve deck, a suction chamber above said inlet chamber, said suction chamber being provided with a top wall forming a discharge valve deck, a pumping cylinder open at its lower end through said discharge valve deck, and a discharge chamber above said suction chamber.

10. In a pump, the combination with an inlet chamber provided with a top wall forming a suction valve deck, of posts rigidly supporting said valve deck from the lower wall of said inlet chamber, one of said posts being provided with a channel therethrough for draining the space above said valve deck, a suction chamber above said inlet chamber, said suction chamber being provided with a top wall forming a dis charge valve deck, a pumping cylinder open at its lower end through said discharge valve deck, a discharge chamber above said suction chamber, and discharge outlets formed in the top wall of said discharge chamber.

11. In a pump, the combination with an inlet chamber provided with a top wall forming a suction valve deck, of posts rigidly supporting said valve deck from the lower wall of said inlet chamber, one of said posts being provided with a channel therethrough for draining the space above said valve deck, a suction chamber above said inlet chamber, said suction chamber being provided with a top wall forming a discharge valve deck, a discharge chamber above said suction chamber having a top wall, a pumping cylinder open at its lower end through said discharge valve deck, said cylinder adapted to be supported by said dischargevalve deck and said top wall of said discharge chamber.

12. In a pump, the combination with an inlet chamber provided with a top wall forming a suction valve deck, of posts rigidly supporting said valve deck from the lower wall of said inlet chamber, a suction chamber above said inlet chamber, said suction chamber being provided with a top wall forming a' discharge valve deck, a discharge chamber above said suction chamber having a top wall, a pumping cylinder open at its lower end through said discharge valve deck, said cylinder adapted to be supported by said discharge valve deck and said top wall of said discharge chamber, and discharge outlets located in the top wall of said discharge chamber.

13. Ina pump, the combination with a battery of cylinders arranged on parallel axes, all of said cylinders being open at each end, pistons reciprocable within said cylinders, a crank shaft operatively connected with said pistons, standards within which said crank shaft is journaled, a discharge valve deck extending around the lower end of said cylinders, a suction valve deck disposed below the first said valve deck and forming therewith a suction chamber, said standards being provided with interlocking connections with and between said cylinders, and a connecting brace for the upper ends of said standards.

H. In a pump, the combination with a battery of cylinders having axes in a common plane, of a web connecting said cylinders in said common plane, pistons reciprocable within said cylinders, a crank shaft operatively connected to said pistons, standards within which said crank shaft is journaled, said standards being provided with interlocking connections with said webs, and a. connecting brace for the upper ends of said standards.

15. In a power pump, the combination with a pair of spaced A frames, of a crank shaft journaled in the upper ends of said frames, a cylinder disposed intermediate of said frames and on either side thereof, pistons reciprocable within said cylinders and operatively connected with said crank shaft, connecting webs for supporting said cylinders from each other, said webs being provided with notches within which the cross bars of said A frames are seated, and a connecting brace for tying the upper ends of said A frames together.

EAR-LE T. ROBINSON.

In the presence of- H. G. FLETCHER, M. G. HAMMoN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! Patents,

Washington, D. C. 

